But as whom? HBO isn't spilling the beans just yet, but all signs point to Gatt playing Wildling leader Styr the Magnar of Thenn. For one, Gatt filmed in Iceland where the scenes beyond the Wall are shot, which would make sense if he is a member of the Wildling army. For two, Styr is described as being a clean-shaven, bald man with a straight nose and grey eyes. Guess who that sounds like?

Again, that's just speculation and isn't confirmed. Those actors who are confirmed for Season 4 are Pedro Pascal as Oberyn Martell, Indira Varma as Ellaria Sand and Roger Ashton Griffiths as Mace Tyrell. Octavia Selena Alexandru, Brennock O'Connor and Trixiebell Harrowell are cast in unknown roles. Meanwhile, the role of Prince Tommen Baratheon has reportedly been recast, and Dean-Charles Champan will now play Joffrey's younger brother.

"Game of Thrones" Season 4 is slated to premiere on HBO in Spring 2014.